Circular weaving loom



Nov. 10, 1931. T. DAVID Nov. 10, 1931. vT. DAvi'n v 1,831,482

CIRCULAR-WEAVING Loom Filed June 26, 1950 2 Sheets-Sheet 2 Patented Nov.10, 1931 UNITED STATE TONY DAVID, orLYoir,` FRANCE a f CIRCULAR WEAVINQLooivr Application filed June 26, 1930, Serial No. 463,999, and inGermany June 28, 1929.

My invention relates to a driving device for shuttles or heddles 1ncircular weaving looms. This device comprises a non-rotating mdeformable member in cooperation with a rotating solid member whichgives the former a shape comprising projections and` de pressions; theseprojections and Vdepressions rotate with the solid member( l j Inaweaving loom using my invention', a

"1,0 first device is used todrive the shuttles. The

m shed of warp threads.

are used for driving the latter are'housed within the successivedepressions of the deformable member and they are pushed by theprojections through one rIwo other devices heddles; supposing that atalieta weave is desired, oneseries of heddles is attached to thedeformablemember of the first device, theother heddles be'- ing attachedto the other member and both members are driven in synchronism with theshuttles, the projections of one corresponding with the depressions ofthe other and with the shuttles to insure the shedding.

In the annexed drawings: f Fig. 1 is a partial plan view of a circularloom according to my invention. y

Fig. 2 is a section on line IV-IV of Fig. 1. Fig. 3 is a fragmental planView in which only the heddles and their driving mechanism arerepresented.

- showing the rear 5 nected parts.

'Figs 4 and 5 reproduce portions of respectively Figs. 2 and 3, to anenlarged scale. Fig.' 6 is an enlarged fragmental plan view y, of ashuttle and the con- The` circular weaving loom represented comprises acylindrical warp, unwound from warp beams, from which the threads rise,the fabric t being wound in the upper portions of the loom.

The warp threads z' and p are drawn through the eyes of heddles l and 2respectively. It is assumed that p are the even threads ande' the oddones. The heddles 1 and 2 are radially arranged (Figs. 2 and 4) into twosuperposed horizontal planes. The inner ends of the upper heddles 1 arefixed to a flexible endless band 3 andthe Ainner ends o. of the lowerheddles 2 are also lixed to lanother flexible endless band 4. Bands 3and 4 arel'p'assed over .idlers 5 and 6 circularly 'arrangedaround theaxis 'of the loom." j" These 'idlers are supported by arms 7 and 7a'ikxedto an :annular member or rim 8, ,which is integralfwit-h rays 8a anda hub 8b keyed on the driving shaft 9of the loom...

The loom represented comprises .fourteen yslnittles and fourteen groupsof idlers' are provided,each group comprising two kidlers 5 and twoidlers-6. Of course, according to kthe length of the shuttles and to thediameter ofthe loom, the number of idlers of eachy groupcould'bevaried;l' Y y' f It will be apparent,from Fig. 2, that to obtain'thesameangulari-opening 'ofthe warp sheds, the' amplitude of the motion ofheddles '2 must be somewhat greater than in the case of heddles 1.Idler's 6 are thereforegreater in diameter't-ha'n idlers 5. .It'willyalso: readily vbeunderstood,` from Fig;V 3, that lthe undulations ofbands 3 andv 4 aren'opposition'so that for a shuttle@ the warp threadsare exterior, threadsl a being interior, these .respective positions'being 'inverted for' the next shuttle; With such an arrangement, ataffeta weave is manufactured on the loom. j I l The shuttles are drivenby means of a third 'endless'band 10 which passes over a group ofidlers'11`and'12 lrotata ly supportedby arms '13and 13a, vfixed to rim8, idlers12 being ex- "teriorto band 10y and idlers 11 being interior.'Band'10 is thus'driven a series of V-shaped undulations vasclearlyshown in Fig. 1, the number of undulations beingv equal' to the lnumberof shuttles, viz. fourteen in the loom represented.- 'l v Y BandplvO. isprovided with double pins 19 and 20 comprising an exterior pin 19 havinga threaded tail driven through the band and on which is screwed a hollowpin 20 having a blind threadedhole. v'

Pins 19 and 20`t into circular depressions 21 provided in idlers 11 and12, and thus maintain band 10 against falling down by gravity (Fig. 4).l Pins 2,0 are also adapted Itocooperate'with a cylindrical comb 18 withwhich theymesh ras if they were gear teeth fixed on the periphery ofidlers 12 (Fig. 6). Thus band'lO remains substantially stationary duringthe rotation of the shuttles. As shown, Fig. 4, cam 18 is supported byuprights 22 fixed to the loom frame b and located between two successiveheddles.

Pins 19 are also adapted to contact the rear of the shuttles (such as nFig. 6) through the inner warp shed in the case of Fig. 6) The rear partof-the shuttles is given a concave section which lits with the path ofpins 19 around idlers 11 as shown in Fig. 6. During the rotation ofidlers 11 around the axis i rotate with .the shuttles.

of thev loom, the shuttles arethus pushed through the sheds.

Each shuttle nis supported by an annular track formed by radial members15 and 16 arranged circularly between the heddles. A s

third circular range of radial members 17 is provided to laterallymaintain the 'upper part of the'shuttles (Fig. 2).

Of course, the angular position of the groups of idlers 5 and 6 withrespect to idlers 11 and 12 is such that the shed is formed in front, ofa shuttle and is closed at the rear thereof. Each shuttle is providedwith a downwardly projecting guiden which passes through the twoVcircular ranges of radial members 14 and 15 which form the shuttletrack.

Each band 3, 4 or 10 is formed of a metallic inner band 40 (of steel forinstance) coated onboth sides with lateral bands 41 of leather. Theinner metallic core 40 of bands 3 or 4 has one of its edges providedwith small projections terminating into balls and 31 respectively forthe bands 3 and 4 (Fig. 4). The inner metallic core of bands 3 or an eyethrough which is forced a ball 30 or 31; The heddles arethus rmlyattached to the bands but may be readily disengaged when necessary.

Somel projections of the bands are longer than the other ones sofas toVproject through the balls 30 or 31 as shown at 32 or 33 in Fig. 4 andthey cooperate with radial slits 24 and 25 provided in plates 23'xed tothe upvrights 22A (Figs. 4 and 5). By such an arrangement, the bandsremain free to move radially (the lengths of slits 24 and 25 Ybeingsuiiicient) and they are maintained radially against rotation around theaxis of the loom.

The outer end of heddles 1 or 2 is provided with an elongated eye 1a or2a loose on pins 28'and 29 fixed on annular members 26 and 27. rlhesepins form guide for the heddles.

The loom works as an ordinary weaving loom having two heddles framesanda plurality of shuttles workingin `regular succession. Y

t It will be observed that by providing other groups of heddles bandssuch as 3 and 4, the

loom could work as an ordinary weaving loom having four, six, eight,etc., heddles frames.

Iclaim:

l 1. AV circular weaving loom comprising warp threads circularlyarranged with respect to the loom axis; shuttles cooperating with saidwarp threads; means to drive said shuttles; heddles adapted to controlsaid warp threads; flexible members to which one end of said heddles isattached; and means to give said members a series of undulations toinsure shedding of the warp threads, said means rotating in synchronismwith the shuttles.

A 2. A circular weaving loom as claimed in claim 1, wherein the'flexiblemembers do not 3. A circular weaving loom as claimed in claim 1,whereinthe flexible members are in the form ofendless inextensible bands.

4. A circular weavingloom as claimed vin claim 1, wherein the flexiblemembers are in the form of bands* having a metallic core coated withleather.

5. A circular weaving loom as claimed in claim 1, wherein' the flexiblemembers are in the form of endless inextensible bandshav-V ingprojections Valong one of their edges, one end of the heddles beingattached to said projections, and some of said projections registeringwith fixed slits,'parallel to the motion of theA heddles, said slits andprojections c0- operating together to maintain said bands againstrotation.

l 6. A circular weaving loom as claimed in claim l, wherein the meansadapted to con- 'trol the shape of the flexible members are in the formof rollers supported by arms rotating with the loom.,

l 7. A circular weaving loom comprising warp threads circularly arrangedwith respect to the loom axis; shuttles adaptedto cooperate with saidwarp threads; a circular track for the shuttles; means to control saidwarp threads to insure shedding of the same; a flexible member co-axialwith the loom; and means to give said member a series of undulations inwhich the shuttles are inserted, said means being driven by the loommechanism, whereby the vshuttles are pushed on their track around thevloom axis.

8. A circular weaving loom as claimed in claim 7 wherein theshuttle-driving flexible member does not'rotate with the shuttles.

9. A circular weaving loom as claimed in claim 7 wherein theshuttle-driving iiexible member is in the form of .an endless band.

10. A circular weaving loom as claimed in claim 7, wherein theshuttle-driving flexible member is in the form-of aband having ametallic core coated with leather.

11. A circular weaving loom as claimed in claim' 7, wherein theshuttle-driving flexible member is a band having pins on its facenearest to the shuttles, said pins being adapted to contact the'shuttlesthrough a warp shed.

A 12. A circular weaving loom as claimed in claim 7 5 wherein theshuttle-driving flexible member is a band having pins on its face remoteto the shuttles, said pins cooperating with a fixed circular comb tohold said band against rotation with the shuttle-s.

13. A circular Weaving loom as claimed in claim 7, wherein the meansadapted to control the sha-pe of the shuttle-driving flexible member arein the form of rollers supported by arms rotating With the loommechanism.

In testimony thereof I aix my signature.

TONY DAVID.

